Remember that a lot of it will be relative, Bottom heavy is only an accurate assessment maybe 1% of the time IMO. All other times it's because the compeittor's upper body is lacking.
I always said that my own lower body was lagging, but to be honest, it's because my upper body was just pretty darn good in comparison. No one in the gym ever critiqued my legs, BUT, I'll always conceded that they were far from the best onstage (at least in terms of quad sweep. My hams and calves were definitely ok).
While I'm 5'8 as well, Brad (Brick) is 5'10, and at his recent show, weighed around 171-173, and I can tell you that he didn;'t lose any discernable muscle getting there. Still, this was honest to goodness contest level lean. He could have very easily chilled around 180-183 and been the most shredded guy in almost any gym he frequents.